Very bad contrast in key areas: find bar text is invisible; sidebar icons as well. Nice concept but no attention to detail. Cannot just flip up a nice background and call it a theme, even in these days of very little theme access to the Firefox UI, surely?

Thank you, G.Gecko! There are a lot of very well-done themes here, but a "problem" I have with many of them is that, while they look nice, even great, for me they too often just aren't "practical." That is to say they kind of obscure the information that's needed, the colors are pretty, but in the end, I guess I don't always prefer "flash over substance." I guess I prefer simplicity over relative clutter.

But you did both. Your work is JUST flashy enough for me, but it's also easy to read. That ain't easy to do and you "dun did it." (A paraphrase of a boxer after an "impossible" win; I won't say who though.)

So again, thanks. AND, you managed to not use, to the extreme, the ubiquitous "Dark" schema; Personally, I'm just bored now with "Dark," guess I'm more of a "Gray guy," despite that I'm old enough to have grown up with true "Blackboards" in school, and the TRS-80 that gave you only a black background with white text; no colors on THOSE!

Listed on solid colors for good reason, does not distract, highlights active tab with silver-grey color, rest is darker bluish.